Charge-forming device for internal-combustion engines.



APPLICATION FILED JUNE 18, 1813.

Patented Aug. 4, 1914,

2 SHEETS-SHEET 1.

'E. SGHNEIDER. CHARGE FORMING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JUNE 18, 1913.

Patented Aug. 4, 1914u 2 BHEETB-SHEET 2.

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CHARGE-FORMING DEVTGE FOR INTERNAL-COMl3USTION ENGINES.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application filed June 18; 1913. Serial No. 774,487.

To all whom it may concern: I Be it known that I," EUGENE SCHNEIDER, citizenof the Republic of France, residing at Le Creuzot, Sane-et-Loire, Franceyhave invented new and useful Improvements in Charge-Forming Devices for Internal-Combustion Engines, of'which the following is a specification.

Engines in which solid fusible fuels such as naphthalene are used comprise in principle a vessel in which the naphthalene is melted by the waste heat of the engine such as the exhaust gases, water circulation and so forth and a suitable heated carbureter utilizing as fuel the liquid arising from the fusion. Starting can be effected either by preliminary running by means of a, volatile fuel such as. petroleum spirit or benzol or by employing a furnace which enables the said vessel and the engineto beheated simultaneously. In thedrnown arrangements the carbureter is arranged at the lower part ofthe reservoir and, like all known-forms of carbureter, comprises a constant-level device regulated by a float. Experience has demon strated that'this arrangement presents the following defects: 1. The'inspection of the float is'troublcsome because it p ierates with a hot liquid which sets immediately'upon inspecting the apparatus. 2. The arrangement of the carburetor at the lower part of the fusion receptacle for the reception of the liquid coming from a higher level renders access to it diflicult. 3. With this arrangement the passages for the carbureted air arenp-passages, which presents an obstacle to carrying badly vaporized drops or particles to the cylinders.

In accordance with he present invention the feed, instead of taking place by gravity from the fuel reservoir toa vessel in which a constant level is maintained by afloat valve, is effected by means of a lifting pump conducting the li uid from the reservoir into a vessel in which a constant level is insured byan overflow so that the jet can be arranged at the upper part of the fuel reservoir at a readily accessible point. The

operation of the lifting pump by the engine itself is rendered possible as soon as starting takes place, (that is to say at a time when the fuel is not liquefied) owing to the interposition, in the transmission, of a resiliiston of they pump to remain stationary until fusion has taken place.

Figures 1 and 2 of the accompanying drawino represent a constructional form of the device as applied to the case in which the fusion of the fuel is produced by the water of circulation raised to a boiling-point.

Fig. 1 represents a cross section. between the two groups of cylinders through the fusion receptacle at the pump and the carbureter. Fig. 2 is a cross section of the fusion receptacle on the line AA in Fig. 1. Figs. 3, 4 and 5 represent in different p0- sitions the resilient portion of the operating rod.

a designates'the receptacle for naphthalene or other solid fuel arranged in a casing in two parts I) 0 containing the circulation water and communicating with the jackets of the cylinders (Z, at the'lower part through conduits e, and at the upper part by means of a sleeve f coveringthe carburation apparatusand accessories. The'fuel issupplied to the apparatus through a socket g. The steam produced by the evaporation of the water is discharged through a conduit h. The sleeve 7 also surrounds the conduit 2' through which the explosive mixture is drawn in so that this mixture is appropriately heated. At 7' the exhaust colloctor of the motor is arranged; in is the hot air conduit which maybifurcate into two branches is In in order to furnish the supply to the primary and secondary air inletsof the carbureter respectively. a

In accordance with the invention the jet m, the nozzle of which opens into the primary air conduit 70' opens at its other end into a cup n. arranged outside and above the fusion receptacle at the upper part of the water jacket I). This cup is supplied by a lifting pump actuated by the engine. With this object the cup'n is connected by an overflow wall n with a well 0 opening at its lower extremity. into a fuel tanlr through a perforated bottom 0. Preferably a portion of the longitudinal wall of the well should be jacketed by the circulation water in order to keep the temperature in the well as high as ossible. In the wall 0 a cylindrical pump b y p is arranged, its bottom carrying a suction valve q. A hollow piston 7' moves object it is divided into two telescopicelements 1) and with the interposition of a spring 12 and of two bearing rings 1: and v These rings are ableto slide on the rod between the two stops 3- and 4 and in the sleeve of between two stops 5 and 6. Normally, when the fuel is melted and the piston opposes no obstacle to its displacement, the parts occupy the position shown in Fig. 3. On starting, and so long as the freevdisplacement of the piston is opposed, the relative displacement of the sleeve 12' and the rod a (shortening Fig. 4: or lengthening Fig. .5) always take place bycompression of the spring 12- which always tends to cause the parts to occupy the position shown in 30 Fig. 3. The liquid fuel raised by the oper-' ation of the piston is discharged through the discharge spout 7, into the cup n into which thesuction pipe of the jet m penetrates. The excess of liquid supplied to the cup n-is discharged over the wall n into the well 0.

It will readily be understood that the arrangement of the jet at the upper part eliminates any rising element. in the conduits for the distribution of the ex losive mixture, thereby obviating any possibility of the return of drops or particles of fuel to the carbureter and insuring that any unvaporized portion of the charge shall be carried to the cylinden It will'of course be understood that the feed device described is also applicable to cases in which the fusion of the fuel is produced by the waste heat of the exhaust. The resilient member interposed in the transmission for operating the pump piston may vary at will; for example it might be replaced by a lever orbeam adapted to be set at difl erent angles or by a device for automatically disengaging the crank in case ofresistance opposed by the piston to its displacement.

What I claim and desire to secureby Letters Patent of the United States is 1. In combination with an internal commoans bustion engine, a jacketed reservoir in which fuel is to be melted by fluid passing through the jacket and heated by the engine, a reciprocating pump and an open receptaclewithin the said reservoir, the latter being located above the normal level of the melted fuel the reservoir and fed by said pump, means for discharging fuel from said receptacle to gine and-said reciprocating pump adaptedto be rendered inoperative when the fuel is .the engine, and connections between the ensolid in the reservoir and active when the I fuel is'liquid.

2. In combination with an infernal combustion engine, a jacketed reservoir in which fuel is to be melted by fluid passing through the jacket and heated by the engine, a reciprocating pump and an open receptacle within the said reservoir, the latter being located above the normal level of the melted fuel in the reservoir and fed by said pump,

means for discharging fuel from said receptacle to the engine, and a yielding connection between said pump and a moving part of the engine adapted to operate said pump when thefuel in the reservoir is liquid and to yield when the fuel in the same is solid.

3. In combination with an internal coinbustion engine, a jacketed reservoir'in which fuel is to be melted by fluid passing through -the jacket andheated by the engine, a reciprocatin pump and an open receptacle within the said reservoir, the latter being located above the normal level of the melted. fuel in the reservoir and fed by said pump, means for discharging fuel from said receptacle to. the engine, connections between the engine and said reciprocating pump adapted to be rendered inoperative when the fuel is solid in the reservoir and active when the fuel is liquid, and a source of liquid fuel independent of the said reservoir: supply for startingthe engine.

4. In combination, a constant levelreservoir in which fuel is to be melted, a reciproeating pump for pumping liquefied oil in' said reservoir, and connections between .a source of power and said pump adapted'to be rendered inoperative to actuate the pum I when the fuelin the reservoir is solid an active when the fuel is liquid.

In testimony whereof have signed name to this specification in the presence I of two subscribing witnesses. I tienne sonnninnn. Witnesses: i

Hanson 0. Com, lEt. DE Snvnmnenn. 

